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Shape memory alloy reinforced magnesium-based composite material with three-dimensional interpenetrating network structure and preparation method thereof

A technology of interpenetrating network structure and memory alloy, which is applied in the field of magnesium-based composite materials and its preparation, can solve the problems that the mechanical properties of materials cannot be effectively regulated, the damage is difficult to automatically repair, and the original shape cannot be restored, so as to achieve the realization of structure and mechanics. Performance, Enhanced Coordination, Reduced Stress Concentration Effects

Active Publication Date: 2020-10-09
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microstructure of traditional magnesium-based composites is difficult to accurately design and control, so the mechanical properties of the material cannot be effectively adjusted, and the combination of the reinforcement phase and the matrix is ​​only realized through the phase interface, which is prone to stress concentration and cracking at the phase interface. question
In addition, the current magnesium and magnesium alloy composites cannot return to their original shape after plastic deformation, and the damage caused by deformation is difficult to repair automatically, which leads to an irreversible decline in material properties.

Method used

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  • Shape memory alloy reinforced magnesium-based composite material with three-dimensional interpenetrating network structure and preparation method thereof
  • Shape memory alloy reinforced magnesium-based composite material with three-dimensional interpenetrating network structure and preparation method thereof
  • Shape memory alloy reinforced magnesium-based composite material with three-dimensional interpenetrating network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this example, a titanium-nickel alloy reinforced magnesium-based composite material with a three-dimensional interpenetrating network structure was prepared. The raw materials used include titanium-nickel alloy powder (the average particle size is 15 μm, and the atomic ratio of titanium to nickel is 1:1), and metal magnesium. Concrete preparation process is as follows:

[0035] 1) Use the 3D visualization solid simulation software Autodesk Inventor Professional (AIP2019) to design a titanium-nickel alloy reinforcement skeleton with a network topology, and establish a 3D model of the skeleton. Such as figure 1As shown, the network topology of the model is established based on the principle of triple periodic minimum surface; the model is imported into the Realizer SLM 100 metal 3D printer formed by laser selective melting technology, and the titanium-nickel alloy is 3D printed under the protection of argon. The powder is prepared into a titanium-nickel alloy reinfor...

Embodiment 2

[0040] In this example, a titanium-nickel alloy reinforced magnesium alloy-based composite material with a three-dimensional interpenetrating network structure was prepared. The raw materials used include titanium-nickel alloy powder (the average particle size is 15 μm, the atomic ratio of titanium to nickel is 1:1), and AZ91D magnesium alloy. Concrete preparation process is as follows:

[0041] 1) This step is the same as step 1) in Example 1;

[0042] 2) The difference between this step and step 2) in Example 1 is that the metal used for infiltrating the nickel-titanium alloy skeleton is AZ91D magnesium alloy, and the infiltration temperature is 860°C;

[0043] 3) This step is the same as step 3) in Example 1.

[0044] After testing, the density of the composite material is 3.4g / cm 3 , the compressive strength is 400MPa, and the compressive plastic strain exceeds 30%. In addition, the composite material has a shape memory effect. When the compressive strain at room tempe...

Embodiment 3

[0046] In this example, a titanium-nickel alloy reinforced magnesium-based composite material with a three-dimensional interpenetrating network structure was prepared. The raw materials used include titanium-nickel alloy powder (the average particle size is 15 μm, and the atomic ratio of titanium to nickel is 1:1), and metal magnesium. Concrete preparation process is as follows:

[0047] 1) This step is similar to step 1) in Example 1, the difference is that the 3D printed titanium-nickel alloy skeleton structure is different, see Figure 5 .

[0048] 2) This step is the same as step 2) in Example 1;

[0049] 3) This step is similar to step 3) in Example 1, except that the volume fraction of the titanium-nickel alloy reinforcement in the composite material is 64%.

[0050] After testing, the density of the composite material is 4.1g / cm 3 , the compressive strength is 590MPa, and the compressive plastic strain exceeds 25%. In addition, the composite material has a shape me...

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Abstract

The invention relates to a magnesium-based composite material with a three-dimensional interpenetrating network structure and reinforced by a 3D-printed shape memory alloy reinforcement framework anda preparation method thereof. The composite material is composed of a shape memory alloy reinforcing body with the volume fraction of 10%-80% and a magnesium or magnesium alloy matrix, has the three-dimensional interpenetrating network structure and is characterized in that the reinforcing body and the matrix respectively have independent topological structures and are inserted and complementarilycombined in a three-dimensional space. The preparation method of the composite material comprises the following steps that the shape memory alloy reinforcement framework with the network topology structure is prepared by adopting a 3D printing technology, the framework is infiltrated by molten magnesium or magnesium alloy melt under a vacuum or protective atmosphere, and the composite material isobtained after solidification and cooling. The composite material is high in strength, large in plasticity, high in controllability of structure and mechanical property, has a certain shape memory effect, namely the room temperature deformation can be partially or completely recovered above the martensite transformation temperature and has considerable application prospect as a novel structural and functional integrated material.

Description

technical field [0001] The invention relates to the field of metal-based composite materials, in particular to a magnesium-based composite material with a three-dimensional interpenetrating network structure and reinforced by a 3D-printed shape-memory alloy reinforcement skeleton and a preparation method thereof. Background technique [0002] Under the premise of ensuring safe service, the realization of lightweight structural materials can effectively reduce the weight of structural parts, thereby helping to save energy and reduce environmental pollution, so it has important scientific significance and practical value. For example, in the field of transportation, the lightweight design of automobiles can improve fuel efficiency, reduce fuel consumption and exhaust emissions, so it has become one of the main trends in today's automobile development. The realization of lightweight structural materials mainly depends on the improvement of their mechanical properties such as sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F3/26B22D23/04B33Y10/00
CPCB22F3/1115B22F3/26B22D23/04B33Y10/00B22F2998/10B22F2999/00
Inventor 刘增乾张明阳张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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